Tartaric acid [ho2cch(oh)ch(oh)co2h] is an important compound in the history of stereochemistry. purification of a mixture of all the possible stereoisomers of tartaric acid by chromatography, using an achiral stationary phase, gives two fractions. one fraction has a melting point of 204 °c and the other has a melting point of 140 °c. both fractions have no detectable optical rotation. the higher melting fraction can be resolved into two compounds with [a] 25 = +12° and [a].25 = -12° (ii) draw the fischer projections for each of the isomers of tartaric acid [ho2cch(oh)ch(oh)co2h]. (3 marks) what isomers are present in each of the two fractions separated by achiral chromatography? (2 marks) why does purification of a mixture of all the possible isomers of tartaric acid by chromatography, using an achiral stationary phase, give only two fractions? spectral analysis (ir, uv, nmr) indicated that each fraction was a "pure" compound. explain. (3 marks) (iii)